Liste des biotopes et milieux floristiques.

Biotope - Typologie Européenne EUNIS

A3.115 - Niveau 5 : Laminaria hyperborea avec algues rouges foliacées denses sur roche infralittorale exposée

Description

Very exposed to exposed infralittoral bedrock or large boulders characterised by the kelp Laminaria hyperborea, beneath which is a dense turf of foliose red seaweeds. Three variations of this biotope are described: the upper infralittoral kelp forest (unit A3.1151), the kelp park below (unit A3.1152) and a third type of kelp forest, confined to southern England, that is characterised by a mixture of L. hyperborea and Laminaria ochroleuca (unit A3.1153). The fauna of these biotopes is markedly less abundant than kelp forests in areas of greater wave surge (unit A3.113); sponges, anthozoans and polyclinid ascidians may be present, though never at high abundance. Beneath the under-storey of red seaweeds, the rock surface is generally covered with encrusting coralline algae.

Taxons (Liens actifs si espèces présentes)

Callophyllis laciniata (Hudson) Kütz., 1843 ( Esp. caract. )
Corallinaceae Lamouroux, 1812 ( Esp. caract. )
Cryptopleura ramosa (Hudson) L.Newton, 1931 ( Esp. caract. )
Delesseria sanguinea (Hudson) J.V.Lamour., 1813 ( Esp. caract. )
Heterosiphonia plumosa (J.Ellis) Batters, 1902 ( Esp. caract. )
Hypoglossum hypoglossoides (Stackh.) F.S.Collins & Hervey, 1917 ( Esp. caract. )
Kallymenia reniformis (Turner) J.Agardh, 1842 ( Esp. caract. )
Membranoptera alata (Hudson) Stackh., 1809 ( Esp. caract. )
Plocamium cartilagineum (L.) P.S.Dixon, 1967 ( Esp. caract. )

Analyse Ecologie du milieu (En fonction des espèces présentes)

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